Noise trap circuit
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United States of America Patent
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-
Oct 3, 1989
Grant Date -
N/A
app pub date -
May 4, 1987
filing date -
May 4, 1987
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A noise trap circuit particularly suitable for use in an electro-acoustic system, operates to suppress low level signals or noise while allowing a relatively large signal to pass unattenuated between input and output terminals of the circuit. Blocking elements between the input and output terminals establish a high impedance path to the noise but switch to a conductive state when the large signals are present at the input terminals. Shunt elements across the output terminals provide a low resistance path or 'crowbar' when only the noise is present at the input terminals, but switch to a non-conductive state when the large signals are sensed at the circuit input.
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